using System;
using System.Runtime.Serialization;

namespace Picnic.Spec.Exceptions
{
	/// <summary>
	/// Represents an exception which should be thrown required exception is not found.
	/// </summary>
	public class RequiredExceptionIsNotThrownException : StatementException
	{
		private readonly Type _requiredException;
		private readonly Type _actualException;

		/// <summary>
		/// Initializes a new instance of the <see cref="RequiredExceptionIsNotThrownException"/> class.
		/// </summary>
		public RequiredExceptionIsNotThrownException()
		{
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="RequiredExceptionIsNotThrownException"/> class.
		/// </summary>
		public RequiredExceptionIsNotThrownException(Type requiredExceptionType)
			: base(string.Format("Required exception \"{0}\" is not thrown.", requiredExceptionType.FullName))
		{
			_requiredException = requiredExceptionType;
			_actualException = null;
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="RequiredExceptionIsNotThrownException"/> class.
		/// </summary>
		public RequiredExceptionIsNotThrownException(Type requiredExceptionType, Exception actualException)
			: base(string.Format("Required exception \"{0}\" is not thrown.", requiredExceptionType.FullName), actualException)
		{
			_requiredException = requiredExceptionType;
			_actualException = actualException == null ? null : actualException.GetType();
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="RequiredExceptionIsNotThrownException"/> class with a specified error message.
		/// </summary>
		/// <param name="message">The message that describes the error. </param>
		public RequiredExceptionIsNotThrownException(string message)
			: base(message)
		{
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="RequiredExceptionIsNotThrownException"/> class with a specified error message and a reference to the inner exception that is the cause of this exception.
		/// </summary>
		/// <param name="message">The error message that explains the reason for the exception. </param><param name="innerException">The exception that is the cause of the current exception, or a null reference (Nothing in Visual Basic) if no inner exception is specified. </param>
		public RequiredExceptionIsNotThrownException(string message, Exception innerException)
			: base(message, innerException)
		{
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="RequiredExceptionIsNotThrownException"/> class with serialized data.
		/// </summary>
		/// <param name="info">The <see cref="T:System.Runtime.Serialization.SerializationInfo"/> that holds the serialized object data about the exception being thrown. </param><param name="context">The <see cref="T:System.Runtime.Serialization.StreamingContext"/> that contains contextual information about the source or destination. </param><exception cref="T:System.ArgumentNullException">The <paramref name="info"/> parameter is null. </exception><exception cref="T:System.Runtime.Serialization.SerializationException">The class name is null or <see cref="P:System.Exception.HResult"/> is zero (0). </exception>
		protected RequiredExceptionIsNotThrownException(SerializationInfo info, StreamingContext context)
			: base(info, context)
		{
		}

		/// <summary>
		/// Gets a type of exception which should be raised.
		/// </summary>
		public Type RequiredExceptionType
		{
			get { return _requiredException; }
		}

		/// <summary>
		/// Gets a type of actualy raised exception.
		/// </summary>
		public Type ActualExceptionType
		{
			get { return _actualException; }
		}
	}
}